n3l - Non-Normal and Nonlinear Effects in Aero- and Thermoacoustics

Aero- and thermoacoustic phenomena are a fascinating challenge in fundamental research, and at the same time play an important role in many industrial applications. For example, the operation of duct systems in power plants, or the sound emitted by aircraft can be strongly affected by aero acoustic sources of sound. Moreover, with the introduction of lean premixed, low emission combustion technology, thermoacoustic stability has become a major challenge in gas turbine combustor development, just as it has been for a long time in rocket science.

Acoustic analysis often relies on a linear description, exploiting the superposition principle for orthogonal eigenmodes, which do not couple with each other. However, in situations where nonlinear or non-normal effects become important, such an approach is no longer adequate. Workshops and Summer Schools on Non-Normal and Nonlinear Effects in Aero- and Thermoacoustics  were held at TUM in 2010 and 2013.

The goal of these events was on the one hand to introduce pertinent concepts and mathematical tools, and on the other to present and discuss that state of the art in research in this area. Invited lectures and scientific papers presented at these events are made available on this web site in the form of recorded videos and PDF files.